Why dont work this fixed cicle ? : G71 (normal mode).

...
T121
G0 X[#26+1] Z8.3
G71 U0.2 R0.3 H1
G71 P1 Q2 U0.1 F0.01
N1G1 U-[#7] W0 F0.005
Z8
G3 Z6 R1.35
Z2 R3.5
Z0 R1.35
N2G1 W-0.3 U-0.3
G0 U[#7]
Z-20X50
G28X0
...
...

This program from other machinen good work. Only M70 in not work.